Web site Notify Me When It's Up performs a very simple but worthwhile task: It sends you an email when a downed site you want to visit returns to the internet. Similar to previously mentioned Down For Everyone or Just Me—which helps you figure out if a site you're having trouble reaching is really down or its, well, just you—Notify Me When It's Up takes the next logical step by monitoring a downed site and letting you know when it returns. Might be useful next time your favorite weblog is unreachable or a link you really want to check out crashes under the weight of its popularity.